TY - BOOK AU - Geruso,Michael AU - Layton,Timothy J. AU - Wallace,Jacob ED - National Bureau of Economic Research. TI - Are All Managed Care Plans Created Equal? Evidence from Random Plan Assignment in Medicaid T2 - NBER working paper series PY - 2020/// CY - Cambridge, Mass. PB - National Bureau of Economic Research N1 - August 2020; Hardcopy version available to institutional subscribers N2 - Exploiting random assignment of Medicaid beneficiaries to managed care plans, we identify plan-specific effects on healthcare utilization. Auto-assignment to the lowest-spending plan generates 30% lower spending than if the same enrollee were assigned to the highest-spending plan, despite identical cost-sharing. Effects via quantities, rather than differences in negotiated prices, explain these patterns. Rather than reducing "wasteful" spending, low-spending plans cause broad reductions in the use of medical services--including low-cost, high-value care--and worsen beneficiary satisfaction and health. Supply side tools circumvent the classic trade-off between financial risk protection and moral hazard, but give rise instead to a cost/quality trade-off UR - https://www.nber.org/papers/w27762 UR - http://dx.doi.org/10.3386/w27762 ER -